Account lockout via unlimited password resets
Published Jul 1, 2026 · Updated Jul 1, 2026
Account denial of service in MyComplianceOffice MCO 25.3.3.1 allows remote attackers to lock users out through password resets. The password-reset flow invalidates the current password and previously issued temporary passwords on every successful request without limiting repeated resets. A victim's email address and correct security-question answer are required; limited answer attempts constrain guessing, but repeated valid resets keep the account inaccessible.
Summary
What happened
Account denial of service in MyComplianceOffice MCO 25.3.3.1 allows remote attackers to lock users out through password resets. The password-reset flow invalidates the current password and previously issued temporary passwords on every successful request without limiting repeated resets. A victim's email address and correct security-question answer are required; limited answer attempts constrain guessing, but repeated valid resets keep the account inaccessible.
The record
- CVE
- CVE-2026-53904
- Published
- Jul 1, 2026
- Updated
- Jul 1, 2026
- Vendor
- MyComplianceOffice
- Product
- MCO
- Classifications
- CWE-307, CWE-640, CAPEC-2, T1531
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 1, 2026CVE publishedPublication date reported by the CVE source.
- Jul 1, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=25.3.3.1
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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